Appendix 1: Hemlock Woolly Adelgid Regulated Areas

August 21, 2025

United States

  • Alaska
  • California
  • Connecticut
  • Delaware
  • District of Columbia
  • Georgia
  • Idaho
  • Kentucky
  • Maine
  • Maryland
  • Massachusetts
  • Michigan
  • Montana
  • New Hampshire
  • New Jersey
  • New York
  • North Carolina
  • Ohio
  • Oregon
  • Pennsylvania
  • Rhode Island
  • South Carolina
  • Tennessee
  • Vermont
  • Virginia
  • Washington
  • West Virginia

Canada

  • British Columbia: the entire province
  • Nova Scotia: the entire counties of Kings, Lunenburg, Digby, Queens, Shelburne, Yarmouth and Annapolis
  • Ontario: the entire regional municipality of Niagara, county of Haldimand, the City of Hamilton and the township of Alnwick/Haldimand in the province of Ontario

For a map and complete description of the Hemlock woolly adelgid regulated area please refer to The Hemlock woolly adelgid Infested Places Order. Contact your local CFIA office for more information.